Soil moisture dynamics and water consumption characteristics of tomato under cyclic aeration subsurface drip irrigation in greenhouse
TANG Zhihan1, WANG Mengmeng2, ZHANG Peng1, ZENG Jian1, DENG Yunpeng1, ZHANG Qian1Symbolj@@
1. College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Taian, Shandong 271018, China; 2. Shandong Linyi Water Conservancy Company, Linyi, Shandong 276000, China
Abstract：To explore the influence law of cyclic aeration underground drip irrigation on soil moisture and tomato water consumption characteristics of tomato in greenhouse. The effects of different drip irrigation depth, aeration level and irrigation amount on soil water content, water consumption, yield and water use efficiency of greenhouse tomato were studied by orthogonal test. The water consumption of tomato increased first and decreased in the whole growth period. The water consumption of tomato treated with aeration was higher than that in without aeration treatment. Compared with without aeration treatment, aeration drip irrigation treatment increased tomato yield by 10% and water use efficiency by 0.4%, respectively. Drip belt depth 15 cm, dissolved oxygen value 30 mg/L, 75%ET0 irrigation vo-lume promoted yield and water use efficiency reached the maximum, which were 64 951.3 kg/hm2 and 23.26 kg/(hm2·mm), respectively. The result show that the effect of aeration treatment on tomato yield and water use efficiency was statistically significant(P<0.05). Aeration had a certain effect on soil moisture content, and helpful to tomato water absorption. Under the interaction, the interaction between the depth of drip irrigation belt and the amount of irrigation has a statistically significant effect on the yield of tomato(P<0.05), the interaction between the depth of drip irrigation belt and the amount of aeration has a statistically significant effect on the yield of tomato(P<0.01). The interaction between irrigation amount and depth of drip irrigation zone, irrigation amount and aeration level had significant effects on tomato water use efficiency(P<0.01).
